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License and Collaboration Agreements (Tables)
 9 Months Ended
Sep. 30, 2020
Research and Development [Abstract]  
Schedule of Activity in Contract Liabilities
The following table presents a summary of the activity in the Company's contract liabilities during the nine months ended September 30, 2020 (in thousands):
Opening balance, January 1, 2020$(172)
Revenue from performance obligations satisfied during reporting period29 
Closing balance, September 30, 2020$(143)